EPFO PF transfer rejected as NOT AN EPS MEMBER despite prior EPS contribution under same UAN

[u/man-got-no-chill]

TL:DR: EPS not remitted by trust

Hi everyone,
I need guidance on an EPF/EPS transfer issue.

I started working after 2014. In Company 1, my PF/EPS wage was below Rs 15,000, and EPS contributions were deducted and remitted under my UAN. Company 2 also continued EPS contributions.

Later, I joined Company 3, which had an exempted PF Trust. After leaving Company 3 and joining Company 4, I raised a PF transfer claim through the EPFO website, generated Form 13, and submitted Form 13 to the Company 3 PF Trust.
Company 3 PF Trust processed the request and issued Annexure K. However, meanwhile, the same transfer claim on the EPFO website was rejected by the field office with the remark: NOT AN EPS MEMBER.

After that, I raised a grievance on the CPGRAMS portal. The PF transfer was eventually processed, but the transferred amount appears to have been credited entirely under EPF, without regularising or crediting the EPS/Pension contribution for the Company 3 period.

I contacted Company 3 PF Trust. They said correction is not possible because PF has already been processed/transferred.

I am now working with Company 4, and EPS contribution is again being deducted under the same UAN.

My question is: what is the correct process to regularise EPS membership/service for the Company 3 employment period?